E2K3 OWA Topology with ISA Server

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From: Fred Yarbrough (fyarbrou_at_yahoo.com)
Date: 08/07/04

  • Next message: FE-FR: "Re: E2K3 OWA Topology with ISA Server" 
    Date: Sat, 7 Aug 2004 16:03:38 -0500

    We are currently running E5.5 and I have an Internet exposed hardened
    webserver with the OWA part installed on it. We only allow SSL to
    authenticate mail users to this OWA site. This has worked fine for several
    years.

    We are looking to upgrade to E2K3 at the end of this year and I am looking
    at how to best setup the OWA for our E2K3 deployment. I would like to
    improve our OWA security while I am at it. We only have 1700 employees and
    there are only 20 users or so connecting to OWA at a time. Most articles
    that I have read talk about using Microsoft's ISA server to sit in the DMZ.
    Evidently the ISA server is a hardened system used to translate between your
    Internet accessible interface and the private server on the inside. This
    seems fine and definitely easier than my current hardened web server running
    OWA that is directly exposed to the Internet.

    My question is: If I use a Microsoft ISA server to serve as my secured
    Internet exposed interface can I simply run the OWA directly from my email
    servers or do I still need to setup a separate OWA server like I currently
    have? I don't want to keep adding Exchange servers especially just to serve
    out OWA. From what I understand, E2K3 now is defined as a Front End server
    (OWA or POP) or a Back End server (MAPI). The old E5.5 simply allowed you
    to install OWA onto any webserver. Also, does anyone know if the ISA server
    will allow you to serve out a loadbalanced OWA that points to all 3 of my
    Exchange servers? This would be cool!

    Thanks,
    Fred

  • Next message: FE-FR: "Re: E2K3 OWA Topology with ISA Server"

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